Die-stock.



No. 730,166. PATENTED JUN-32,1903.

' N. SAWYBR.

DIE STOCK. APPLICATION FILED NOV. 1, 1902. N0 MODEL. y

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UNrren' STATES PATENT: v

' Patented June 2, 1903.

OFFI E;

DIE-STOCK.

SPECIFICATION forming part of Letters Patent No. 730,166, dated June 2,1903.

v Application filed November 1, 1902. Serial No. 129,658. (No model.)

To all whom, it may concern:

Be it known that I, NnLsoN SAWYER, a citizen of the UnitedStates,residing at Cleveland, in the county of Ouyahoga and State of Ohio, haveinventeda certain new and useful Improvement in Die-Stocks, of which thefollowing is a full, clear, and'exaet description, reference being hadto the accompanying drawings. v

The object of my invention is to provide a die-stock having a head whichis recessed to receive a member hinged thereto, with suitable means foradjusting the relative position of said hinged member and also withmeans for locking them together in any adjusted po-- sition.

It is a further object of my invention to pro-. vide a suitable latchfor the dies.

- The invention is fully disclosed in the following description andclaim, and illustrated in the drawings.

Referring to the drawings, Figure 1 is a top plan view of my device.-Fig. 2 is a side elevation. Fig. 3 is a bottom plan. Fig. 4 is ahorizontal section taken on the line 4 4 of Fig. 2 and showing the diesin place. Fig. 5 is a cross-section on line 5 5 ofF-ig. l.' Fig. 6 is asection on line 6 6 of Fig. 1, and Fig. 7 is a detail view in section,showing the die and the latch therefor.

Referring to the parts by letters, A represents the head of thedie-stock, having a member pivoted thereto at A and occupying a recessin one end of the head. An adjusting-screw a mounted in the head, isadapted to engage a shoulder a on the hinged member A of the stock. Onehandle, B, is screwed through the handle-socket a, which has a conicalend 1), adapted to engage a conical recess a? in the end of the hingedmember A of the stock.

another handle-socket a. WVhen the stock is being closed, the member Ais swung upon its pivot until the shoulder a abuts against the adjlisting-screw a and the handle B is then screwed into the handle-socketa until the conical end 1) engages in the conical recess a therebyfirmly locking the member A of the stock to the head A and against theadjustable set-screw a Another handle, B, is secured to the oppositeside of the head, preferably in The head A and the hinged member A ofthe stock are'provided with radial recessesO, in which the dies D areadapted-to slide. These dies are substantially of the form shown in Fig.5, having cutting-teeth d on their inner ends and a cut-away portion dat the top and near the back end, whereby they may pass under theretaining-plates F and a cross-notch d in such cut-away portion for thepurpose of being engaged by a latch which will retain the dies in placein the stock. Each one of the dies D is secured within its recess Oagainst endwise movement by means of a latch E. This latch consists of athumb piece e, a squared shank e, which projects through acircumferential slot F ina retaining-plate F, and has on the lower endthereof a boss e for engaging in the notch d of the die. .The plates F.are semicircular inform and are placed upon the stock, as shown, and aresecured thereto'by means of screws f.

The latches E operate in the following manner: If dies are already inthe stock, the boss 6 of each latch is in engagement with the re-' cessd of each die. WVhen' the dies are to be removed, the thumb is placedupon one of the thumb-pieces and the latch in connection therewith ismoved until the boss 2 passes out of the notch 01 of each die, when thedie will be free to slide from its recess. This operation is continuedin connection with each die. If other dies areto be inserted, they aretaken individually and passed into a recess, being pushed in as far asthey will go. Then the latch is moved toward the die, thus carrying theboss 6 into engagement with the recess i On the under side of the stockis arranged a suitable guiding mechanism for the pipe to be threaded,which consists of the jaws G, adapted to slide in suitable openings inthe stockand having .ins which en a e cam- 3 3 b b slots h in anoperative ring H. This ring is retained in proper position 'bymeans ofanother ring K, which is secured to the stock by means of screws k.

A thumb-piece M may be provided upon the hinged member A of the stockfor swinging the same upon its pivot.

Having described my invention, I claim- In a die-stock consisting of ahead having a r .l o

suitable recess therein adapted to receive a said'hinged member,substantially as and for IO hinged member and having also aninternallythe purpose specified. threaded tubular handle-socket, amember In testimony whereof I hereunto afiix 111 y hinged to said headand having a conical resignature in the presence of two Witnesses. cessin its free end, a handle screwed into 1 a *I r T i said socket, andhaving a conical lnner end NE bAxVl LR for engaging the recess in theend of said Vitnesses: hinged member and an adjusting-screw E. 13.GILCHRIST, mounted in said head for engagement with E. L. THURSTON.

